const Koa = require('koa');
const Router = require('koa-router');
const session = require('koa-generic-session');
const flash = require('koa-better-flash');

const app = new Koa();
const router = new Router();

router.post('/', (ctx, next) => {
  // you can also pass an array of messages:
  // ctx.flash('info', [ 'hi', 'hello', 'good morning' ]);
  ctx.flash('info', 'hello world');
  ctx.status = 200;
});

router.get('/', ctx => {
  // to get all messages by type simply call `ctx.flash()`
  ctx.body = ctx.flash('info');
  // outputs: [ 'hello world ']
});

app.keys = [ 'keys' ];
app.use(session());
app.use(flash());
app.use(router.routes());
app.listen();